Question

Am trying to get the constructor’s arguments from the class of $object:

$reflectionClass = new \ReflectionClass($object);
$constructor = $reflectionClass->getConstructor();
$constructor_params = $constructor -> getParameters();

The error I get:

Fatal error: Call to a member function getParameters() on a non-object

Update:

It turns out that it doesn’t have a constructor. How can I check that it does first?

Answer 1

Check whether it has a constructor with:

if (null !== ($constructor = $reflectionClass->getConstructor())) {
    // we have a constructor
}

However, that doesn’t necessarily mean you can instantiate an object (e.g. when the constructor is private):

if ($reflectionClass->isInstantiable()) {
    // class can be instantiated with new XYZ()
}